Adding installation instructions in TensorRT RREADME.md

llvm/projects/hpvm-tensor-rt/README.md

+# AppproxHPVM Tensor Runtime
+
+## Dependencies
+
+* CUDNN-7.0 or above
+* CUDA-9.0 or above
+* CUBLAS-9.0 or above - often included with cuda-toolkit
+
+## BUILD
+
+```shell
+source bin/setup_runtime_paths.sh
+mkdir build
+cd build
+cmake ../
+make
+```
+
+